The updated handbook from CISA offers fresh guidance on spotting and stopping threats that originate from within an organisation. The agency emphasises that insider risks can involve both physical actions, such as stealing hardware, and cyber activities, like exfiltrating data. The guide is designed to help security teams build better detection and response plans.

The publication comes as insider incidents continue to pose a significant challenge for many companies. Unlike external attackers, insiders often have legitimate access to systems and facilities, making their actions harder to detect. CISA’s new material is intended to provide practical steps for improving oversight and reducing the chances of a successful breach.